1 What: /sys/bus/iio/devices/iio:deviceX
3 Contact: linux-iio@vger.kernel.org
5 Hardware chip or device accessed by one communication port.
6 Corresponds to a grouping of sensor channels. X is the IIO
9 What: /sys/bus/iio/devices/triggerX
11 Contact: linux-iio@vger.kernel.org
13 An event driven driver of data capture to an in kernel buffer.
14 May be provided by a device driver that also has an IIO device
15 based on hardware generated events (e.g. data ready) or
16 provided by a separate driver for other hardware (e.g.
17 periodic timer, GPIO or high resolution timer).
18 Contains trigger type specific elements. These do not
19 generalize well and hence are not documented in this file.
20 X is the IIO index of the trigger.
22 What: /sys/bus/iio/devices/iio:deviceX/buffer
24 Contact: linux-iio@vger.kernel.org
26 Directory of attributes relating to the buffer for the device.
28 What: /sys/bus/iio/devices/iio:deviceX/name
30 Contact: linux-iio@vger.kernel.org
32 Description of the physical chip / device for device X.
33 Typically a part number.
35 What: /sys/bus/iio/devices/iio:deviceX/timestamp_clock
37 Contact: linux-iio@vger.kernel.org
39 String identifying current posix clock used to timestamp
40 buffered samples and events for device X.
42 What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency
43 What: /sys/bus/iio/devices/iio:deviceX/buffer/sampling_frequency
44 What: /sys/bus/iio/devices/triggerX/sampling_frequency
46 Contact: linux-iio@vger.kernel.org
48 Some devices have internal clocks. This parameter sets the
49 resulting sampling frequency. In many devices this
50 parameter has an effect on input filters etc. rather than
51 simply controlling when the input is sampled. As this
52 effects data ready triggers, hardware buffers and the sysfs
53 direct access interfaces, it may be found in any of the
54 relevant directories. If it effects all of the above
55 then it is to be found in the base device directory.
57 What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency_available
58 What: /sys/.../iio:deviceX/buffer/sampling_frequency_available
59 What: /sys/bus/iio/devices/triggerX/sampling_frequency_available
61 Contact: linux-iio@vger.kernel.org
63 When the internal sampling clock can only take a small
64 discrete set of values, this file lists those available.
66 What: /sys/bus/iio/devices/iio:deviceX/oversampling_ratio
68 Contact: linux-iio@vger.kernel.org
70 Hardware dependent ADC oversampling. Controls the sampling ratio
71 of the digital filter if available.
73 What: /sys/bus/iio/devices/iio:deviceX/oversampling_ratio_available
75 Contact: linux-iio@vger.kernel.org
77 Hardware dependent values supported by the oversampling filter.
79 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_raw
80 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw
81 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_raw
82 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_raw
84 Contact: linux-iio@vger.kernel.org
86 Raw (unscaled no bias removal etc.) voltage measurement from
87 channel Y. In special cases where the channel does not
88 correspond to externally available input one of the named
89 versions may be used. The number must always be specified and
90 unique to allow association with event codes. Units after
91 application of scale and offset are millivolts.
93 Channels with 'i' and 'q' modifiers always exist in pairs and both
94 channels refer to the same signal. The 'i' channel contains the in-phase
95 component of the signal while the 'q' channel contains the quadrature
98 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw
100 Contact: linux-iio@vger.kernel.org
102 Raw (unscaled) differential voltage measurement equivalent to
103 channel Y - channel Z where these channel numbers apply to the
104 physically equivalent inputs when non differential readings are
105 separately available. In differential only parts, then all that
106 is required is a consistent labeling. Units after application
107 of scale and offset are millivolts.
109 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_raw
110 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_raw
112 Contact: linux-iio@vger.kernel.org
114 Raw (unscaled no bias removal etc.) current measurement from
115 channel Y. In special cases where the channel does not
116 correspond to externally available input one of the named
117 versions may be used. The number must always be specified and
118 unique to allow association with event codes. Units after
119 application of scale and offset are milliamps.
121 What: /sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw
123 Contact: linux-iio@vger.kernel.org
125 Raw capacitance measurement from channel Y. Units after
126 application of scale and offset are nanofarads.
128 What: /sys/.../iio:deviceX/in_capacitanceY-in_capacitanceZ_raw
130 Contact: linux-iio@vger.kernel.org
132 Raw differential capacitance measurement equivalent to
133 channel Y - channel Z where these channel numbers apply to the
134 physically equivalent inputs when non differential readings are
135 separately available. In differential only parts, then all that
136 is required is a consistent labeling. Units after application
137 of scale and offset are nanofarads.
139 What: /sys/bus/iio/devices/iio:deviceX/in_temp_raw
140 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_raw
141 What: /sys/bus/iio/devices/iio:deviceX/in_temp_x_raw
142 What: /sys/bus/iio/devices/iio:deviceX/in_temp_y_raw
143 What: /sys/bus/iio/devices/iio:deviceX/in_temp_ambient_raw
144 What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_raw
145 KernelVersion: 2.6.35
146 Contact: linux-iio@vger.kernel.org
148 Raw (unscaled no bias removal etc.) temperature measurement.
149 If an axis is specified it generally means that the temperature
150 sensor is associated with one part of a compound device (e.g.
151 a gyroscope axis). The ambient and object modifiers distinguish
152 between ambient (reference) and distant temperature for contact-
153 less measurements. Units after application of scale and offset
154 are milli degrees Celsius.
156 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_input
157 KernelVersion: 2.6.38
158 Contact: linux-iio@vger.kernel.org
160 Scaled temperature measurement in milli degrees Celsius.
162 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_raw
163 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_raw
164 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_raw
165 KernelVersion: 2.6.35
166 Contact: linux-iio@vger.kernel.org
168 Acceleration in direction x, y or z (may be arbitrarily assigned
169 but should match other such assignments on device).
170 Has all of the equivalent parameters as per voltageY. Units
171 after application of scale and offset are m/s^2.
173 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw
174 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw
175 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw
176 KernelVersion: 2.6.35
177 Contact: linux-iio@vger.kernel.org
179 Angular velocity about axis x, y or z (may be arbitrarily
180 assigned). Has all the equivalent parameters as per voltageY.
181 Units after application of scale and offset are radians per
184 What: /sys/bus/iio/devices/iio:deviceX/in_incli_x_raw
185 What: /sys/bus/iio/devices/iio:deviceX/in_incli_y_raw
186 What: /sys/bus/iio/devices/iio:deviceX/in_incli_z_raw
187 KernelVersion: 2.6.35
188 Contact: linux-iio@vger.kernel.org
190 Inclination raw reading about axis x, y or z (may be
191 arbitrarily assigned). Data converted by application of offset
192 and scale to degrees.
194 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_raw
195 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_raw
196 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_raw
197 KernelVersion: 2.6.35
198 Contact: linux-iio@vger.kernel.org
200 Magnetic field along axis x, y or z (may be arbitrarily
201 assigned). Data converted by application of offset
204 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_peak_raw
205 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_peak_raw
206 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_peak_raw
207 KernelVersion: 2.6.36
208 Contact: linux-iio@vger.kernel.org
210 Highest value since some reset condition. These
211 attributes allow access to this and are otherwise
212 the direct equivalent of the <type>Y[_name]_raw attributes.
214 What: /sys/bus/iio/devices/iio:deviceX/in_accel_xyz_squared_peak_raw
215 KernelVersion: 2.6.36
216 Contact: linux-iio@vger.kernel.org
218 A computed peak value based on the sum squared magnitude of
219 the underlying value in the specified directions.
221 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_raw
222 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_raw
224 Contact: linux-iio@vger.kernel.org
226 Raw pressure measurement from channel Y. Units after
227 application of scale and offset are kilopascal.
229 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_input
230 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_input
232 Contact: linux-iio@vger.kernel.org
234 Scaled pressure measurement from channel Y, in kilopascal.
236 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_raw
238 Contact: linux-iio@vger.kernel.org
240 Raw humidity measurement of air. Units after application of
241 scale and offset are milli percent.
243 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_input
245 Contact: linux-iio@vger.kernel.org
247 Scaled humidity measurement in milli percent.
249 What: /sys/bus/iio/devices/iio:deviceX/in_X_mean_raw
251 Contact: linux-iio@vger.kernel.org
253 Averaged raw measurement from channel X. The number of values
254 used for averaging is device specific. The converting rules for
255 normal raw values also applies to the averaged raw values.
257 What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset
258 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
259 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
260 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_offset
261 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset
262 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset
263 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_offset
264 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_offset
265 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_offset
266 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_offset
267 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_offset
268 What: /sys/bus/iio/devices/iio:deviceX/in_current_offset
269 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_offset
270 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_offset
271 What: /sys/bus/iio/devices/iio:deviceX/in_current_q_offset
272 What: /sys/bus/iio/devices/iio:deviceX/in_current_i_offset
273 What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset
274 What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset
275 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_offset
276 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_offset
277 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_offset
278 What: /sys/bus/iio/devices/iio:deviceX/in_magn_offset
279 What: /sys/bus/iio/devices/iio:deviceX/in_rot_offset
280 KernelVersion: 2.6.35
281 Contact: linux-iio@vger.kernel.org
283 If known for a device, offset to be added to <type>[Y]_raw prior
284 to scaling by <type>[Y]_scale in order to obtain value in the
285 <type> units as specified in <type>[Y]_raw documentation.
286 Not present if the offset is always 0 or unknown. If Y or
287 axis <x|y|z> is not present, then the offset applies to all
288 in channels of <type>.
289 May be writable if a variable offset can be applied on the
290 device. Note that this is different to calibbias which
291 is for devices (or drivers) that apply offsets to compensate
292 for variation between different instances of the part, typically
293 adjusted by using some hardware supported calibration procedure.
294 Calibbias is applied internally, offset is applied in userspace
297 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_scale
298 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_scale
299 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_scale
300 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale
301 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_scale
302 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_scale
303 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_scale
304 What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_scale
305 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_scale
306 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale
307 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_scale
308 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_scale
309 What: /sys/bus/iio/devices/iio:deviceX/in_current_scale
310 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_scale
311 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_scale
312 What: /sys/bus/iio/devices/iio:deviceX/in_current_i_scale
313 What: /sys/bus/iio/devices/iio:deviceX/in_current_q_scale
314 What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale
315 What: /sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
316 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
317 What: /sys/bus/iio/devices/iio:deviceX/in_energy_scale
318 What: /sys/bus/iio/devices/iio:deviceX/in_distance_scale
319 What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale
320 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale
321 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale
322 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale
323 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_scale
324 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_scale
325 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_scale
326 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_scale
327 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
328 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale
329 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale
330 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale
331 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_scale
332 KernelVersion: 2.6.35
333 Contact: linux-iio@vger.kernel.org
335 If known for a device, scale to be applied to <type>Y[_name]_raw
336 post addition of <type>[Y][_name]_offset in order to obtain the
337 measured value in <type> units as specified in
338 <type>[Y][_name]_raw documentation. If shared across all in
339 channels then Y and <x|y|z> are not present and the value is
340 called <type>[Y][_name]_scale. The peak modifier means this
341 value is applied to <type>Y[_name]_peak_raw values.
343 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias
344 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias
345 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias
346 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias
347 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
348 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
349 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
350 What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
351 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibbias
352 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibbias
353 KernelVersion: 2.6.35
354 Contact: linux-iio@vger.kernel.org
356 Hardware applied calibration offset (assumed to fix production
359 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale
360 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale
361 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale
362 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale
363 What /sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale
364 What /sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale
365 What /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
366 What /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
367 What /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
368 What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale
369 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale
370 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
371 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
372 what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
373 what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
374 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale
375 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale
376 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_calibscale
377 KernelVersion: 2.6.35
378 Contact: linux-iio@vger.kernel.org
380 Hardware applied calibration scale factor (assumed to fix
381 production inaccuracies). If shared across all channels,
382 <type>_calibscale is used.
384 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
385 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
386 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
387 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
389 Contact: linux-iio@vger.kernel.org
391 Gender of the user (e.g.: male, female) used by some pedometers
392 to compute the stride length, distance, speed and activity
395 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
396 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
397 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
398 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
400 Contact: linux-iio@vger.kernel.org
402 Lists all available gender values (e.g.: male, female).
404 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight
405 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight
406 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight
407 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight
409 Contact: linux-iio@vger.kernel.org
411 Height of the user (in meters) used by some pedometers
412 to compute the stride length, distance, speed and activity
415 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibweight
417 Contact: linux-iio@vger.kernel.org
419 Weight of the user (in kg). It is needed by some pedometers
420 to compute the calories burnt by the user.
422 What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available
423 What: /sys/.../iio:deviceX/in_anglvel_scale_available
424 What: /sys/.../iio:deviceX/in_magn_scale_available
425 What: /sys/.../iio:deviceX/in_illuminance_scale_available
426 What: /sys/.../iio:deviceX/in_intensity_scale_available
427 What: /sys/.../iio:deviceX/in_proximity_scale_available
428 What: /sys/.../iio:deviceX/in_voltageX_scale_available
429 What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available
430 What: /sys/.../iio:deviceX/out_voltageX_scale_available
431 What: /sys/.../iio:deviceX/out_altvoltageX_scale_available
432 What: /sys/.../iio:deviceX/in_capacitance_scale_available
433 What: /sys/.../iio:deviceX/in_pressure_scale_available
434 What: /sys/.../iio:deviceX/in_pressureY_scale_available
435 KernelVersion: 2.6.35
436 Contact: linux-iio@vger.kernel.org
438 If a discrete set of scale values is available, they
439 are listed in this attribute.
441 What /sys/bus/iio/devices/iio:deviceX/out_voltageY_hardwaregain
442 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_red_hardwaregain
443 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_green_hardwaregain
444 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_blue_hardwaregain
445 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_clear_hardwaregain
446 KernelVersion: 2.6.35
447 Contact: linux-iio@vger.kernel.org
449 Hardware applied gain factor. If shared across all channels,
450 <type>_hardwaregain is used.
452 What: /sys/.../in_accel_filter_low_pass_3db_frequency
453 What: /sys/.../in_magn_filter_low_pass_3db_frequency
454 What: /sys/.../in_anglvel_filter_low_pass_3db_frequency
456 Contact: linux-iio@vger.kernel.org
458 If a known or controllable low pass filter is applied
459 to the underlying data channel, then this parameter
460 gives the 3dB frequency of the filter in Hz.
462 What: /sys/.../in_accel_filter_high_pass_3db_frequency
463 What: /sys/.../in_anglvel_filter_high_pass_3db_frequency
464 What: /sys/.../in_magn_filter_high_pass_3db_frequency
466 Contact: linux-iio@vger.kernel.org
468 If a known or controllable high pass filter is applied
469 to the underlying data channel, then this parameter
470 gives the 3dB frequency of the filter in Hz.
472 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
473 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
474 KernelVersion: 2.6.37
475 Contact: linux-iio@vger.kernel.org
477 Raw (unscaled, no bias etc.) output voltage for
478 channel Y. The number must always be specified and
479 unique if the output corresponds to a single channel.
480 While DAC like devices typically use out_voltage,
481 a continuous frequency generating device, such as
482 a DDS or PLL should use out_altvoltage.
484 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY&Z_raw
485 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY&Z_raw
486 KernelVersion: 2.6.37
487 Contact: linux-iio@vger.kernel.org
489 Raw (unscaled, no bias etc.) output voltage for an aggregate of
490 channel Y, channel Z, etc. This interface is available in cases
491 where a single output sets the value for multiple channels
494 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown_mode
495 What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown_mode
496 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown_mode
497 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown_mode
498 KernelVersion: 2.6.38
499 Contact: linux-iio@vger.kernel.org
501 Specifies the output powerdown mode.
502 DAC output stage is disconnected from the amplifier and
503 1kohm_to_gnd: connected to ground via an 1kOhm resistor,
504 6kohm_to_gnd: connected to ground via a 6kOhm resistor,
505 20kohm_to_gnd: connected to ground via a 20kOhm resistor,
506 90kohm_to_gnd: connected to ground via a 90kOhm resistor,
507 100kohm_to_gnd: connected to ground via an 100kOhm resistor,
508 125kohm_to_gnd: connected to ground via an 125kOhm resistor,
509 500kohm_to_gnd: connected to ground via a 500kOhm resistor,
510 640kohm_to_gnd: connected to ground via a 640kOhm resistor,
511 three_state: left floating.
512 For a list of available output power down options read
513 outX_powerdown_mode_available. If Y is not present the
514 mode is shared across all outputs.
516 What: /sys/.../iio:deviceX/out_voltageY_powerdown_mode_available
517 What: /sys/.../iio:deviceX/out_voltage_powerdown_mode_available
518 What: /sys/.../iio:deviceX/out_altvoltageY_powerdown_mode_available
519 What: /sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available
520 KernelVersion: 2.6.38
521 Contact: linux-iio@vger.kernel.org
523 Lists all available output power down modes.
524 If Y is not present the mode is shared across all outputs.
526 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown
527 What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown
528 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
529 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown
530 KernelVersion: 2.6.38
531 Contact: linux-iio@vger.kernel.org
533 Writing 1 causes output Y to enter the power down mode specified
534 by the corresponding outY_powerdown_mode. DAC output stage is
535 disconnected from the amplifier. Clearing returns to normal
536 operation. Y may be suppressed if all outputs are controlled
539 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency
541 Contact: linux-iio@vger.kernel.org
543 Output frequency for channel Y in Hz. The number must always be
544 specified and unique if the output corresponds to a single
547 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_phase
549 Contact: linux-iio@vger.kernel.org
551 Phase in radians of one frequency/clock output Y
552 (out_altvoltageY) relative to another frequency/clock output
553 (out_altvoltageZ) of the device X. The number must always be
554 specified and unique if the output corresponds to a single
557 What: /sys/bus/iio/devices/iio:deviceX/events
558 KernelVersion: 2.6.35
559 Contact: linux-iio@vger.kernel.org
561 Configuration of which hardware generated events are passed up
564 What: /sys/.../iio:deviceX/events/in_accel_x_thresh_rising_en
565 What: /sys/.../iio:deviceX/events/in_accel_x_thresh_falling_en
566 What: /sys/.../iio:deviceX/events/in_accel_y_thresh_rising_en
567 What: /sys/.../iio:deviceX/events/in_accel_y_thresh_falling_en
568 What: /sys/.../iio:deviceX/events/in_accel_z_thresh_rising_en
569 What: /sys/.../iio:deviceX/events/in_accel_z_thresh_falling_en
570 What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_rising_en
571 What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_falling_en
572 What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_rising_en
573 What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_falling_en
574 What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_rising_en
575 What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_falling_en
576 What: /sys/.../iio:deviceX/events/in_magn_x_thresh_rising_en
577 What: /sys/.../iio:deviceX/events/in_magn_x_thresh_falling_en
578 What: /sys/.../iio:deviceX/events/in_magn_y_thresh_rising_en
579 What: /sys/.../iio:deviceX/events/in_magn_y_thresh_falling_en
580 What: /sys/.../iio:deviceX/events/in_magn_z_thresh_rising_en
581 What: /sys/.../iio:deviceX/events/in_magn_z_thresh_falling_en
582 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_rising_en
583 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_falling_en
584 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_rising_en
585 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_falling_en
586 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_en
587 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_en
588 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_rising_en
589 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_falling_en
590 What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_rising_en
591 What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_falling_en
592 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_rising_en
593 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_falling_en
594 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_either_en
595 What: /sys/.../iio:deviceX/events/in_tempY_thresh_rising_en
596 What: /sys/.../iio:deviceX/events/in_tempY_thresh_falling_en
597 KernelVersion: 2.6.37
598 Contact: linux-iio@vger.kernel.org
600 Event generated when channel passes a threshold in the specified
601 (_rising|_falling) direction. If the direction is not specified,
602 then either the device will report an event which ever direction
603 a single threshold value is passed in (e.g.
604 <type>[Y][_name]_<raw|input>_thresh_value) or
605 <type>[Y][_name]_<raw|input>_thresh_rising_value and
606 <type>[Y][_name]_<raw|input>_thresh_falling_value may take
607 different values, but the device can only enable both thresholds
609 Note the driver will assume the last p events requested are
610 to be enabled where p is how many it supports (which may vary
611 depending on the exact set requested. So if you want to be
612 sure you have set what you think you have, check the contents of
613 these attributes after everything is configured. Drivers may
614 have to buffer any parameters so that they are consistent when
615 a given event type is enabled at a future point (and not those for
616 whatever event was previously enabled).
618 What: /sys/.../iio:deviceX/events/in_accel_x_roc_rising_en
619 What: /sys/.../iio:deviceX/events/in_accel_x_roc_falling_en
620 What: /sys/.../iio:deviceX/events/in_accel_y_roc_rising_en
621 What: /sys/.../iio:deviceX/events/in_accel_y_roc_falling_en
622 What: /sys/.../iio:deviceX/events/in_accel_z_roc_rising_en
623 What: /sys/.../iio:deviceX/events/in_accel_z_roc_falling_en
624 What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_rising_en
625 What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_falling_en
626 What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_rising_en
627 What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_falling_en
628 What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_rising_en
629 What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_falling_en
630 What: /sys/.../iio:deviceX/events/in_magn_x_roc_rising_en
631 What: /sys/.../iio:deviceX/events/in_magn_x_roc_falling_en
632 What: /sys/.../iio:deviceX/events/in_magn_y_roc_rising_en
633 What: /sys/.../iio:deviceX/events/in_magn_y_roc_falling_en
634 What: /sys/.../iio:deviceX/events/in_magn_z_roc_rising_en
635 What: /sys/.../iio:deviceX/events/in_magn_z_roc_falling_en
636 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_rising_en
637 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_falling_en
638 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_rising_en
639 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_falling_en
640 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_rising_en
641 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_falling_en
642 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_rising_en
643 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_falling_en
644 What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_rising_en
645 What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_falling_en
646 What: /sys/.../iio:deviceX/events/in_voltageY_roc_rising_en
647 What: /sys/.../iio:deviceX/events/in_voltageY_roc_falling_en
648 What: /sys/.../iio:deviceX/events/in_tempY_roc_rising_en
649 What: /sys/.../iio:deviceX/events/in_tempY_roc_falling_en
650 KernelVersion: 2.6.37
651 Contact: linux-iio@vger.kernel.org
653 Event generated when channel passes a threshold on the rate of
654 change (1st differential) in the specified (_rising|_falling)
655 direction. If the direction is not specified, then either the
656 device will report an event which ever direction a single
657 threshold value is passed in (e.g.
658 <type>[Y][_name]_<raw|input>_roc_value) or
659 <type>[Y][_name]_<raw|input>_roc_rising_value and
660 <type>[Y][_name]_<raw|input>_roc_falling_value may take
661 different values, but the device can only enable both rate of
662 change thresholds or neither.
663 Note the driver will assume the last p events requested are
664 to be enabled where p is however many it supports (which may
665 vary depending on the exact set requested. So if you want to be
666 sure you have set what you think you have, check the contents of
667 these attributes after everything is configured. Drivers may
668 have to buffer any parameters so that they are consistent when
669 a given event type is enabled a future point (and not those for
670 whatever event was previously enabled).
672 What: /sys/.../events/in_accel_thresh_rising_value
673 What: /sys/.../events/in_accel_thresh_falling_value
674 What: /sys/.../events/in_accel_x_raw_thresh_rising_value
675 What: /sys/.../events/in_accel_x_raw_thresh_falling_value
676 What: /sys/.../events/in_accel_y_raw_thresh_rising_value
677 What: /sys/.../events/in_accel_y_raw_thresh_falling_value
678 What: /sys/.../events/in_accel_z_raw_thresh_rising_value
679 What: /sys/.../events/in_accel_z_raw_thresh_falling_value
680 What: /sys/.../events/in_anglvel_x_raw_thresh_rising_value
681 What: /sys/.../events/in_anglvel_x_raw_thresh_falling_value
682 What: /sys/.../events/in_anglvel_y_raw_thresh_rising_value
683 What: /sys/.../events/in_anglvel_y_raw_thresh_falling_value
684 What: /sys/.../events/in_anglvel_z_raw_thresh_rising_value
685 What: /sys/.../events/in_anglvel_z_raw_thresh_falling_value
686 What: /sys/.../events/in_magn_x_raw_thresh_rising_value
687 What: /sys/.../events/in_magn_x_raw_thresh_falling_value
688 What: /sys/.../events/in_magn_y_raw_thresh_rising_value
689 What: /sys/.../events/in_magn_y_raw_thresh_falling_value
690 What: /sys/.../events/in_magn_z_raw_thresh_rising_value
691 What: /sys/.../events/in_magn_z_raw_thresh_falling_value
692 What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_rising_value
693 What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_falling_value
694 What: /sys/.../events/in_rot_from_north_true_raw_thresh_rising_value
695 What: /sys/.../events/in_rot_from_north_true_raw_thresh_falling_value
696 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_rising_value
697 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_falling_value
698 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_rising_value
699 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_falling_value
700 What: /sys/.../events/in_voltageY_supply_raw_thresh_rising_value
701 What: /sys/.../events/in_voltageY_supply_raw_thresh_falling_value
702 What: /sys/.../events/in_voltageY_raw_thresh_rising_value
703 What: /sys/.../events/in_voltageY_raw_thresh_falling_value
704 What: /sys/.../events/in_tempY_raw_thresh_rising_value
705 What: /sys/.../events/in_tempY_raw_thresh_falling_value
706 What: /sys/.../events/in_illuminance0_thresh_falling_value
707 what: /sys/.../events/in_illuminance0_thresh_rising_value
708 what: /sys/.../events/in_proximity0_thresh_falling_value
709 what: /sys/.../events/in_proximity0_thresh_rising_value
710 KernelVersion: 2.6.37
711 Contact: linux-iio@vger.kernel.org
713 Specifies the value of threshold that the device is comparing
714 against for the events enabled by
715 <type>Y[_name]_thresh[_rising|falling]_en.
716 If separate attributes exist for the two directions, but
717 direction is not specified for this attribute, then a single
718 threshold value applies to both directions.
719 The raw or input element of the name indicates whether the
720 value is in raw device units or in processed units (as _raw
721 and _input do on sysfs direct channel read attributes).
723 What: /sys/.../events/in_accel_scale
724 What: /sys/.../events/in_accel_peak_scale
725 What: /sys/.../events/in_anglvel_scale
726 What: /sys/.../events/in_magn_scale
727 What: /sys/.../events/in_rot_from_north_magnetic_scale
728 What: /sys/.../events/in_rot_from_north_true_scale
729 What: /sys/.../events/in_voltage_scale
730 What: /sys/.../events/in_voltage_supply_scale
731 What: /sys/.../events/in_temp_scale
732 What: /sys/.../events/in_illuminance_scale
733 What: /sys/.../events/in_proximity_scale
735 Contact: linux-iio@vger.kernel.org
737 Specifies the conversion factor from the standard units
738 to device specific units used to set the event trigger
741 What: /sys/.../events/in_accel_x_thresh_rising_hysteresis
742 What: /sys/.../events/in_accel_x_thresh_falling_hysteresis
743 What: /sys/.../events/in_accel_x_thresh_either_hysteresis
744 What: /sys/.../events/in_accel_y_thresh_rising_hysteresis
745 What: /sys/.../events/in_accel_y_thresh_falling_hysteresis
746 What: /sys/.../events/in_accel_y_thresh_either_hysteresis
747 What: /sys/.../events/in_accel_z_thresh_rising_hysteresis
748 What: /sys/.../events/in_accel_z_thresh_falling_hysteresis
749 What: /sys/.../events/in_accel_z_thresh_either_hysteresis
750 What: /sys/.../events/in_anglvel_x_thresh_rising_hysteresis
751 What: /sys/.../events/in_anglvel_x_thresh_falling_hysteresis
752 What: /sys/.../events/in_anglvel_x_thresh_either_hysteresis
753 What: /sys/.../events/in_anglvel_y_thresh_rising_hysteresis
754 What: /sys/.../events/in_anglvel_y_thresh_falling_hysteresis
755 What: /sys/.../events/in_anglvel_y_thresh_either_hysteresis
756 What: /sys/.../events/in_anglvel_z_thresh_rising_hysteresis
757 What: /sys/.../events/in_anglvel_z_thresh_falling_hysteresis
758 What: /sys/.../events/in_anglvel_z_thresh_either_hysteresis
759 What: /sys/.../events/in_magn_x_thresh_rising_hysteresis
760 What: /sys/.../events/in_magn_x_thresh_falling_hysteresis
761 What: /sys/.../events/in_magn_x_thresh_either_hysteresis
762 What: /sys/.../events/in_magn_y_thresh_rising_hysteresis
763 What: /sys/.../events/in_magn_y_thresh_falling_hysteresis
764 What: /sys/.../events/in_magn_y_thresh_either_hysteresis
765 What: /sys/.../events/in_magn_z_thresh_rising_hysteresis
766 What: /sys/.../events/in_magn_z_thresh_falling_hysteresis
767 What: /sys/.../events/in_magn_z_thresh_either_hysteresis
768 What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_hysteresis
769 What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_hysteresis
770 What: /sys/.../events/in_rot_from_north_magnetic_thresh_either_hysteresis
771 What: /sys/.../events/in_rot_from_north_true_thresh_rising_hysteresis
772 What: /sys/.../events/in_rot_from_north_true_thresh_falling_hysteresis
773 What: /sys/.../events/in_rot_from_north_true_thresh_either_hysteresis
774 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_hysteresis
775 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_hysteresis
776 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_either_hysteresis
777 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_hysteresis
778 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_hysteresis
779 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_either_hysteresis
780 What: /sys/.../events/in_voltageY_thresh_rising_hysteresis
781 What: /sys/.../events/in_voltageY_thresh_falling_hysteresis
782 What: /sys/.../events/in_voltageY_thresh_either_hysteresis
783 What: /sys/.../events/in_tempY_thresh_rising_hysteresis
784 What: /sys/.../events/in_tempY_thresh_falling_hysteresis
785 What: /sys/.../events/in_tempY_thresh_either_hysteresis
786 What: /sys/.../events/in_illuminance0_thresh_falling_hysteresis
787 what: /sys/.../events/in_illuminance0_thresh_rising_hysteresis
788 what: /sys/.../events/in_illuminance0_thresh_either_hysteresis
789 what: /sys/.../events/in_proximity0_thresh_falling_hysteresis
790 what: /sys/.../events/in_proximity0_thresh_rising_hysteresis
791 what: /sys/.../events/in_proximity0_thresh_either_hysteresis
793 Contact: linux-iio@vger.kernel.org
795 Specifies the hysteresis of threshold that the device is comparing
796 against for the events enabled by
797 <type>Y[_name]_thresh[_(rising|falling)]_hysteresis.
798 If separate attributes exist for the two directions, but
799 direction is not specified for this attribute, then a single
800 hysteresis value applies to both directions.
801 For falling events the hysteresis is added to the _value attribute for
802 this event to get the upper threshold for when the event goes back to
803 normal, for rising events the hysteresis is subtracted from the _value
804 attribute. E.g. if in_voltage0_raw_thresh_rising_value is set to 1200
805 and in_voltage0_raw_thresh_rising_hysteresis is set to 50. The event
806 will get activated once in_voltage0_raw goes above 1200 and will become
807 deactived again once the value falls below 1150.
809 What: /sys/.../events/in_accel_x_raw_roc_rising_value
810 What: /sys/.../events/in_accel_x_raw_roc_falling_value
811 What: /sys/.../events/in_accel_y_raw_roc_rising_value
812 What: /sys/.../events/in_accel_y_raw_roc_falling_value
813 What: /sys/.../events/in_accel_z_raw_roc_rising_value
814 What: /sys/.../events/in_accel_z_raw_roc_falling_value
815 What: /sys/.../events/in_anglvel_x_raw_roc_rising_value
816 What: /sys/.../events/in_anglvel_x_raw_roc_falling_value
817 What: /sys/.../events/in_anglvel_y_raw_roc_rising_value
818 What: /sys/.../events/in_anglvel_y_raw_roc_falling_value
819 What: /sys/.../events/in_anglvel_z_raw_roc_rising_value
820 What: /sys/.../events/in_anglvel_z_raw_roc_falling_value
821 What: /sys/.../events/in_magn_x_raw_roc_rising_value
822 What: /sys/.../events/in_magn_x_raw_roc_falling_value
823 What: /sys/.../events/in_magn_y_raw_roc_rising_value
824 What: /sys/.../events/in_magn_y_raw_roc_falling_value
825 What: /sys/.../events/in_magn_z_raw_roc_rising_value
826 What: /sys/.../events/in_magn_z_raw_roc_falling_value
827 What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_rising_value
828 What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_falling_value
829 What: /sys/.../events/in_rot_from_north_true_raw_roc_rising_value
830 What: /sys/.../events/in_rot_from_north_true_raw_roc_falling_value
831 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_rising_value
832 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_falling_value
833 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_rising_value
834 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_falling_value
835 What: /sys/.../events/in_voltageY_supply_raw_roc_rising_value
836 What: /sys/.../events/in_voltageY_supply_raw_roc_falling_value
837 What: /sys/.../events/in_voltageY_raw_roc_rising_value
838 What: /sys/.../events/in_voltageY_raw_roc_falling_value
839 What: /sys/.../events/in_tempY_raw_roc_rising_value
840 What: /sys/.../events/in_tempY_raw_roc_falling_value
841 KernelVersion: 2.6.37
842 Contact: linux-iio@vger.kernel.org
844 Specifies the value of rate of change threshold that the
845 device is comparing against for the events enabled by
846 <type>[Y][_name]_roc[_rising|falling]_en.
847 If separate attributes exist for the two directions,
848 but direction is not specified for this attribute,
849 then a single threshold value applies to both directions.
850 The raw or input element of the name indicates whether the
851 value is in raw device units or in processed units (as _raw
852 and _input do on sysfs direct channel read attributes).
854 What: /sys/.../events/in_accel_x_thresh_rising_period
855 What: /sys/.../events/in_accel_x_thresh_falling_period
856 What: /sys/.../events/in_accel_x_roc_rising_period
857 What: /sys/.../events/in_accel_x_roc_falling_period
858 What: /sys/.../events/in_accel_y_thresh_rising_period
859 What: /sys/.../events/in_accel_y_thresh_falling_period
860 What: /sys/.../events/in_accel_y_roc_rising_period
861 What: /sys/.../events/in_accel_y_roc_falling_period
862 What: /sys/.../events/in_accel_z_thresh_rising_period
863 What: /sys/.../events/in_accel_z_thresh_falling_period
864 What: /sys/.../events/in_accel_z_roc_rising_period
865 What: /sys/.../events/in_accel_z_roc_falling_period
866 What: /sys/.../events/in_anglvel_x_thresh_rising_period
867 What: /sys/.../events/in_anglvel_x_thresh_falling_period
868 What: /sys/.../events/in_anglvel_x_roc_rising_period
869 What: /sys/.../events/in_anglvel_x_roc_falling_period
870 What: /sys/.../events/in_anglvel_y_thresh_rising_period
871 What: /sys/.../events/in_anglvel_y_thresh_falling_period
872 What: /sys/.../events/in_anglvel_y_roc_rising_period
873 What: /sys/.../events/in_anglvel_y_roc_falling_period
874 What: /sys/.../events/in_anglvel_z_thresh_rising_period
875 What: /sys/.../events/in_anglvel_z_thresh_falling_period
876 What: /sys/.../events/in_anglvel_z_roc_rising_period
877 What: /sys/.../events/in_anglvel_z_roc_falling_period
878 What: /sys/.../events/in_magn_x_thresh_rising_period
879 What: /sys/.../events/in_magn_x_thresh_falling_period
880 What: /sys/.../events/in_magn_x_roc_rising_period
881 What: /sys/.../events/in_magn_x_roc_falling_period
882 What: /sys/.../events/in_magn_y_thresh_rising_period
883 What: /sys/.../events/in_magn_y_thresh_falling_period
884 What: /sys/.../events/in_magn_y_roc_rising_period
885 What: /sys/.../events/in_magn_y_roc_falling_period
886 What: /sys/.../events/in_magn_z_thresh_rising_period
887 What: /sys/.../events/in_magn_z_thresh_falling_period
888 What: /sys/.../events/in_magn_z_roc_rising_period
889 What: /sys/.../events/in_magn_z_roc_falling_period
890 What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_period
891 What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_period
892 What: /sys/.../events/in_rot_from_north_magnetic_roc_rising_period
893 What: /sys/.../events/in_rot_from_north_magnetic_roc_falling_period
894 What: /sys/.../events/in_rot_from_north_true_thresh_rising_period
895 What: /sys/.../events/in_rot_from_north_true_thresh_falling_period
896 What: /sys/.../events/in_rot_from_north_true_roc_rising_period
897 What: /sys/.../events/in_rot_from_north_true_roc_falling_period
898 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_period
899 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_period
900 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_rising_period
901 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_falling_period
902 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_period
903 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_period
904 What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_rising_period
905 What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_falling_period
906 What: /sys/.../events/in_voltageY_supply_thresh_rising_period
907 What: /sys/.../events/in_voltageY_supply_thresh_falling_period
908 What: /sys/.../events/in_voltageY_supply_roc_rising_period
909 What: /sys/.../events/in_voltageY_supply_roc_falling_period
910 What: /sys/.../events/in_voltageY_thresh_rising_period
911 What: /sys/.../events/in_voltageY_thresh_falling_period
912 What: /sys/.../events/in_voltageY_roc_rising_period
913 What: /sys/.../events/in_voltageY_roc_falling_period
914 What: /sys/.../events/in_tempY_thresh_rising_period
915 What: /sys/.../events/in_tempY_thresh_falling_period
916 What: /sys/.../events/in_tempY_roc_rising_period
917 What: /sys/.../events/in_tempY_roc_falling_period
918 What: /sys/.../events/in_accel_x&y&z_mag_falling_period
919 What: /sys/.../events/in_intensity0_thresh_period
920 What: /sys/.../events/in_proximity0_thresh_period
921 What: /sys/.../events/in_activity_still_thresh_rising_period
922 What: /sys/.../events/in_activity_still_thresh_falling_period
923 What: /sys/.../events/in_activity_walking_thresh_rising_period
924 What: /sys/.../events/in_activity_walking_thresh_falling_period
925 What: /sys/.../events/in_activity_jogging_thresh_rising_period
926 What: /sys/.../events/in_activity_jogging_thresh_falling_period
927 What: /sys/.../events/in_activity_running_thresh_rising_period
928 What: /sys/.../events/in_activity_running_thresh_falling_period
929 KernelVersion: 2.6.37
930 Contact: linux-iio@vger.kernel.org
932 Period of time (in seconds) for which the condition must be
933 met before an event is generated. If direction is not
934 specified then this period applies to both directions.
936 What: /sys/.../events/in_accel_thresh_rising_low_pass_filter_3db
937 What: /sys/.../events/in_anglvel_thresh_rising_low_pass_filter_3db
938 What: /sys/.../events/in_magn_thresh_rising_low_pass_filter_3db
940 Contact: linux-iio@vger.kernel.org
942 If a low pass filter can be applied to the event generation
943 this property gives its 3db frequency in Hz.
944 A value of zero disables the filter.
946 What: /sys/.../events/in_accel_thresh_rising_high_pass_filter_3db
947 What: /sys/.../events/in_anglvel_thresh_rising_high_pass_filter_3db
948 What: /sys/.../events/in_magn_thresh_rising_high_pass_filter_3db
950 Contact: linux-iio@vger.kernel.org
952 If a high pass filter can be applied to the event generation
953 this property gives its 3db frequency in Hz.
954 A value of zero disables the filter.
956 What: /sys/.../events/in_activity_still_thresh_rising_en
957 What: /sys/.../events/in_activity_still_thresh_falling_en
958 What: /sys/.../events/in_activity_walking_thresh_rising_en
959 What: /sys/.../events/in_activity_walking_thresh_falling_en
960 What: /sys/.../events/in_activity_jogging_thresh_rising_en
961 What: /sys/.../events/in_activity_jogging_thresh_falling_en
962 What: /sys/.../events/in_activity_running_thresh_rising_en
963 What: /sys/.../events/in_activity_running_thresh_falling_en
965 Contact: linux-iio@vger.kernel.org
967 Enables or disables activitity events. Depending on direction
968 an event is generated when sensor ENTERS or LEAVES a given state.
970 What: /sys/.../events/in_activity_still_thresh_rising_value
971 What: /sys/.../events/in_activity_still_thresh_falling_value
972 What: /sys/.../events/in_activity_walking_thresh_rising_value
973 What: /sys/.../events/in_activity_walking_thresh_falling_value
974 What: /sys/.../events/in_activity_jogging_thresh_rising_value
975 What: /sys/.../events/in_activity_jogging_thresh_falling_value
976 What: /sys/.../events/in_activity_running_thresh_rising_value
977 What: /sys/.../events/in_activity_running_thresh_falling_value
979 Contact: linux-iio@vger.kernel.org
981 Confidence value (in units as percentage) to be used
982 for deciding when an event should be generated. E.g for
983 running: If the confidence value reported by the sensor
984 is greater than in_activity_running_thresh_rising_value
985 then the sensor ENTERS running state. Conversely, if the
986 confidence value reported by the sensor is lower than
987 in_activity_running_thresh_falling_value then the sensor
988 is LEAVING running state.
990 What: /sys/.../iio:deviceX/events/in_accel_mag_en
991 What: /sys/.../iio:deviceX/events/in_accel_mag_rising_en
992 What: /sys/.../iio:deviceX/events/in_accel_mag_falling_en
993 What: /sys/.../iio:deviceX/events/in_accel_x_mag_en
994 What: /sys/.../iio:deviceX/events/in_accel_x_mag_rising_en
995 What: /sys/.../iio:deviceX/events/in_accel_x_mag_falling_en
996 What: /sys/.../iio:deviceX/events/in_accel_y_mag_en
997 What: /sys/.../iio:deviceX/events/in_accel_y_mag_rising_en
998 What: /sys/.../iio:deviceX/events/in_accel_y_mag_falling_en
999 What: /sys/.../iio:deviceX/events/in_accel_z_mag_en
1000 What: /sys/.../iio:deviceX/events/in_accel_z_mag_rising_en
1001 What: /sys/.../iio:deviceX/events/in_accel_z_mag_falling_en
1002 What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_rising_en
1003 What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_falling_en
1004 KernelVersion: 2.6.37
1005 Contact: linux-iio@vger.kernel.org
1007 Similar to in_accel_x_thresh[_rising|_falling]_en, but here the
1008 magnitude of the channel is compared to the threshold, not its
1011 What: /sys/.../events/in_accel_raw_mag_value
1012 What: /sys/.../events/in_accel_x_raw_mag_rising_value
1013 What: /sys/.../events/in_accel_y_raw_mag_rising_value
1014 What: /sys/.../events/in_accel_z_raw_mag_rising_value
1015 KernelVersion: 2.6.37
1016 Contact: linux-iio@vger.kernel.org
1018 The value to which the magnitude of the channel is compared. If
1019 number or direction is not specified, applies to all channels of
1022 What: /sys/.../events/in_steps_change_en
1024 Contact: linux-iio@vger.kernel.org
1026 Event generated when channel passes a threshold on the absolute
1027 change in value. E.g. for steps: a step change event is
1028 generated each time the user takes N steps, where N is set using
1029 in_steps_change_value.
1031 What: /sys/.../events/in_steps_change_value
1033 Contact: linux-iio@vger.kernel.org
1035 Specifies the value of change threshold that the
1036 device is comparing against for the events enabled by
1037 <type>[Y][_name]_roc[_rising|falling|]_en. E.g. for steps:
1038 if set to 3, a step change event will be generated every 3
1041 What: /sys/bus/iio/devices/iio:deviceX/trigger/current_trigger
1042 KernelVersion: 2.6.35
1043 Contact: linux-iio@vger.kernel.org
1045 The name of the trigger source being used, as per string given
1046 in /sys/class/iio/triggerY/name.
1048 What: /sys/bus/iio/devices/iio:deviceX/buffer/length
1049 KernelVersion: 2.6.35
1050 Contact: linux-iio@vger.kernel.org
1052 Number of scans contained by the buffer.
1054 What: /sys/bus/iio/devices/iio:deviceX/buffer/enable
1055 KernelVersion: 2.6.35
1056 Contact: linux-iio@vger.kernel.org
1058 Actually start the buffer capture up. Will start trigger
1059 if first device and appropriate.
1061 What: /sys/bus/iio/devices/iio:deviceX/scan_elements
1062 KernelVersion: 2.6.37
1063 Contact: linux-iio@vger.kernel.org
1065 Directory containing interfaces for elements that will be
1066 captured for a single triggered sample set in the buffer.
1068 What: /sys/.../iio:deviceX/scan_elements/in_accel_x_en
1069 What: /sys/.../iio:deviceX/scan_elements/in_accel_y_en
1070 What: /sys/.../iio:deviceX/scan_elements/in_accel_z_en
1071 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_en
1072 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_en
1073 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
1074 What: /sys/.../iio:deviceX/scan_elements/in_magn_x_en
1075 What: /sys/.../iio:deviceX/scan_elements/in_magn_y_en
1076 What: /sys/.../iio:deviceX/scan_elements/in_magn_z_en
1077 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_en
1078 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_en
1079 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_en
1080 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_en
1081 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_en
1082 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
1083 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_en
1084 What: /sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
1085 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
1086 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
1087 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_en
1088 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_en
1089 What: /sys/.../iio:deviceX/scan_elements/in_incli_x_en
1090 What: /sys/.../iio:deviceX/scan_elements/in_incli_y_en
1091 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_en
1092 What: /sys/.../iio:deviceX/scan_elements/in_pressure_en
1093 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
1094 What: /sys/.../iio:deviceX/scan_elements/in_proximity_en
1095 KernelVersion: 2.6.37
1096 Contact: linux-iio@vger.kernel.org
1098 Scan element control for triggered data capture.
1100 What: /sys/.../iio:deviceX/scan_elements/in_accel_type
1101 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_type
1102 What: /sys/.../iio:deviceX/scan_elements/in_magn_type
1103 What: /sys/.../iio:deviceX/scan_elements/in_incli_type
1104 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_type
1105 What: /sys/.../iio:deviceX/scan_elements/in_voltage_type
1106 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
1107 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_type
1108 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_type
1109 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_type
1110 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_type
1111 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_type
1112 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_type
1113 What: /sys/.../iio:deviceX/scan_elements/in_pressure_type
1114 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_type
1115 What: /sys/.../iio:deviceX/scan_elements/in_proximity_type
1116 KernelVersion: 2.6.37
1117 Contact: linux-iio@vger.kernel.org
1119 Description of the scan element data storage within the buffer
1120 and hence the form in which it is read from user-space.
1121 Form is [be|le]:[s|u]bits/storagebits[>>shift].
1122 be or le specifies big or little endian. s or u specifies if
1123 signed (2's complement) or unsigned. bits is the number of bits
1124 of data and storagebits is the space (after padding) that it
1125 occupies in the buffer. shift if specified, is the shift that
1126 needs to be applied prior to masking out unused bits. Some
1127 devices put their data in the middle of the transferred elements
1128 with additional information on both sides. Note that some
1129 devices will have additional information in the unused bits
1130 so to get a clean value, the bits value must be used to mask
1131 the buffer output value appropriately. The storagebits value
1132 also specifies the data alignment. So s48/64>>2 will be a
1133 signed 48 bit integer stored in a 64 bit location aligned to
1134 a 64 bit boundary. To obtain the clean value, shift right 2
1135 and apply a mask to zero the top 16 bits of the result.
1136 For other storage combinations this attribute will be extended
1139 What: /sys/.../iio:deviceX/scan_elements/in_accel_type_available
1140 KernelVersion: 2.6.37
1141 Contact: linux-iio@vger.kernel.org
1143 If the type parameter can take one of a small set of values,
1144 this attribute lists them.
1146 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_index
1147 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_index
1148 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_index
1149 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_index
1150 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_index
1151 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_index
1152 What: /sys/.../iio:deviceX/scan_elements/in_accel_x_index
1153 What: /sys/.../iio:deviceX/scan_elements/in_accel_y_index
1154 What: /sys/.../iio:deviceX/scan_elements/in_accel_z_index
1155 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_index
1156 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_index
1157 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_index
1158 What: /sys/.../iio:deviceX/scan_elements/in_magn_x_index
1159 What: /sys/.../iio:deviceX/scan_elements/in_magn_y_index
1160 What: /sys/.../iio:deviceX/scan_elements/in_magn_z_index
1161 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_index
1162 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_index
1163 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_index
1164 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_index
1165 What: /sys/.../iio:deviceX/scan_elements/in_incli_x_index
1166 What: /sys/.../iio:deviceX/scan_elements/in_incli_y_index
1167 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_index
1168 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_index
1169 What: /sys/.../iio:deviceX/scan_elements/in_pressure_index
1170 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_index
1171 What: /sys/.../iio:deviceX/scan_elements/in_proximity_index
1172 KernelVersion: 2.6.37
1173 Contact: linux-iio@vger.kernel.org
1175 A single positive integer specifying the position of this
1176 scan element in the buffer. Note these are not dependent on
1177 what is enabled and may not be contiguous. Thus for user-space
1178 to establish the full layout these must be used in conjunction
1179 with all _en attributes to establish which channels are present,
1180 and the relevant _type attributes to establish the data storage
1183 What: /sys/.../iio:deviceX/in_activity_still_input
1184 What: /sys/.../iio:deviceX/in_activity_walking_input
1185 What: /sys/.../iio:deviceX/in_activity_jogging_input
1186 What: /sys/.../iio:deviceX/in_activity_running_input
1188 Contact: linux-iio@vger.kernel.org
1190 This attribute is used to read the confidence for an activity
1191 expressed in units as percentage.
1193 What: /sys/.../iio:deviceX/in_anglvel_z_quadrature_correction_raw
1194 KernelVersion: 2.6.38
1195 Contact: linux-iio@vger.kernel.org
1197 This attribute is used to read the amount of quadrature error
1198 present in the device at a given time.
1200 What: /sys/.../iio:deviceX/in_accelX_power_mode
1202 Contact: linux-iio@vger.kernel.org
1204 Specifies the chip power mode.
1205 low_noise: reduce noise level from ADC,
1206 low_power: enable low current consumption.
1207 For a list of available output power modes read
1208 in_accel_power_mode_available.
1210 What: /sys/.../iio:deviceX/in_energy_input
1211 What: /sys/.../iio:deviceX/in_energy_raw
1213 Contact: linux-iio@vger.kernel.org
1215 This attribute is used to read the energy value reported by the
1216 device (e.g.: human activity sensors report energy burnt by the
1217 user). Units after application of scale are Joules.
1219 What: /sys/.../iio:deviceX/in_distance_input
1220 What: /sys/.../iio:deviceX/in_distance_raw
1222 Contact: linux-iio@vger.kernel.org
1224 This attribute is used to read the distance covered by the user
1225 since the last reboot while activated. Units after application
1226 of scale are meters.
1228 What: /sys/bus/iio/devices/iio:deviceX/store_eeprom
1229 KernelVersion: 3.4.0
1230 Contact: linux-iio@vger.kernel.org
1232 Writing '1' stores the current device configuration into
1233 on-chip EEPROM. After power-up or chip reset the device will
1234 automatically load the saved configuration.
1236 What: /sys/.../iio:deviceX/in_proximity_raw
1237 What: /sys/.../iio:deviceX/in_proximity_input
1238 What: /sys/.../iio:deviceX/in_proximityY_raw
1240 Contact: linux-iio@vger.kernel.org
1242 Proximity measurement indicating that some
1243 object is near the sensor, usually by observing
1244 reflectivity of infrared or ultrasound emitted.
1245 Often these sensors are unit less and as such conversion
1246 to SI units is not possible. Higher proximity measurements
1247 indicate closer objects, and vice versa.
1249 What: /sys/.../iio:deviceX/in_illuminance_input
1250 What: /sys/.../iio:deviceX/in_illuminance_raw
1251 What: /sys/.../iio:deviceX/in_illuminanceY_input
1252 What: /sys/.../iio:deviceX/in_illuminanceY_raw
1253 What: /sys/.../iio:deviceX/in_illuminanceY_mean_raw
1254 What: /sys/.../iio:deviceX/in_illuminance_ir_raw
1255 What: /sys/.../iio:deviceX/in_illuminance_clear_raw
1257 Contact: linux-iio@vger.kernel.org
1259 Illuminance measurement, units after application of scale
1262 What: /sys/.../iio:deviceX/in_intensityY_raw
1263 What: /sys/.../iio:deviceX/in_intensityY_ir_raw
1264 What: /sys/.../iio:deviceX/in_intensityY_both_raw
1265 What: /sys/.../iio:deviceX/in_intensityY_uv_raw
1267 Contact: linux-iio@vger.kernel.org
1269 Unit-less light intensity. Modifiers both and ir indicate
1270 that measurements contains visible and infrared light
1271 components or just infrared light, respectively. Modifier uv indicates
1272 that measurements contain ultraviolet light components.
1274 What: /sys/.../iio:deviceX/in_uvindex_input
1276 Contact: linux-iio@vger.kernel.org
1278 UV light intensity index measuring the human skin's response to
1279 different wavelength of sunlight weighted according to the
1280 standardised CIE Erythemal Action Spectrum. UV index values range
1281 from 0 (low) to >=11 (extreme).
1283 What: /sys/.../iio:deviceX/in_intensity_red_integration_time
1284 What: /sys/.../iio:deviceX/in_intensity_green_integration_time
1285 What: /sys/.../iio:deviceX/in_intensity_blue_integration_time
1286 What: /sys/.../iio:deviceX/in_intensity_clear_integration_time
1287 What: /sys/.../iio:deviceX/in_illuminance_integration_time
1289 Contact: linux-iio@vger.kernel.org
1291 This attribute is used to get/set the integration time in
1294 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
1296 Contact: linux-iio@vger.kernel.org
1298 Number of seconds in which to compute speed.
1300 What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
1302 Contact: linux-iio@vger.kernel.org
1304 Raw value of quaternion components using a format
1305 x y z w. Here x, y, and z component represents the axis about
1306 which a rotation will occur and w component represents the
1309 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_raw
1310 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_raw
1311 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_raw
1312 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_raw
1314 Contact: linux-iio@vger.kernel.org
1316 Raw value of rotation from true/magnetic north measured with
1317 or without compensation from tilt sensors.
1319 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_raw
1320 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_i_raw
1321 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_q_raw
1323 Contact: linux-iio@vger.kernel.org
1325 Raw current measurement from channel X. Units are in milliamps
1326 after application of scale and offset. If no offset or scale is
1327 present, output should be considered as processed with the
1330 Channels with 'i' and 'q' modifiers always exist in pairs and both
1331 channels refer to the same signal. The 'i' channel contains the in-phase
1332 component of the signal while the 'q' channel contains the quadrature
1335 What: /sys/.../iio:deviceX/in_energy_en
1336 What: /sys/.../iio:deviceX/in_distance_en
1337 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
1338 What: /sys/.../iio:deviceX/in_steps_en
1340 Contact: linux-iio@vger.kernel.org
1342 Activates a device feature that runs in firmware/hardware.
1343 E.g. for steps: the pedometer saves power while not used;
1344 when activated, it will count the steps taken by the user in
1345 firmware and export them through in_steps_input.
1347 What: /sys/.../iio:deviceX/in_steps_input
1349 Contact: linux-iio@vger.kernel.org
1351 This attribute is used to read the number of steps taken by the user
1352 since the last reboot while activated.
1354 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_input
1355 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_raw
1357 Contact: linux-iio@vger.kernel.org
1359 This attribute is used to read the current speed value of the
1360 user (which is the norm or magnitude of the velocity vector).
1361 Units after application of scale are m/s.
1363 What: /sys/.../iio:deviceX/in_steps_debounce_count
1365 Contact: linux-iio@vger.kernel.org
1367 Specifies the number of steps that must occur within
1368 in_steps_filter_debounce_time for the pedometer to decide the
1369 consumer is making steps.
1371 What: /sys/.../iio:deviceX/in_steps_debounce_time
1373 Contact: linux-iio@vger.kernel.org
1375 Specifies number of seconds in which we compute the steps
1376 that occur in order to decide if the consumer is making steps.
1378 What: /sys/bus/iio/devices/iio:deviceX/buffer/watermark
1380 Contact: linux-iio@vger.kernel.org
1382 A single positive integer specifying the maximum number of scan
1383 elements to wait for.
1384 Poll will block until the watermark is reached.
1385 Blocking read will wait until the minimum between the requested
1386 read amount or the low water mark is available.
1387 Non-blocking read will retrieve the available samples from the
1388 buffer even if there are less samples then watermark level. This
1389 allows the application to block on poll with a timeout and read
1390 the available samples after the timeout expires and thus have a
1391 maximum delay guarantee.
1393 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_enabled
1395 Contact: linux-iio@vger.kernel.org
1397 A read-only boolean value that indicates if the hardware fifo is
1398 currently enabled or disabled. If the device does not have a
1399 hardware fifo this entry is not present.
1400 The hardware fifo is enabled when the buffer is enabled if the
1401 current hardware fifo watermark level is set and other current
1402 device settings allows it (e.g. if a trigger is set that samples
1403 data differently that the hardware fifo does then hardware fifo
1405 If the hardware fifo is enabled and the level of the hardware
1406 fifo reaches the hardware fifo watermark level the device will
1407 flush its hardware fifo to the device buffer. Doing a non
1408 blocking read on the device when no samples are present in the
1409 device buffer will also force a flush.
1410 When the hardware fifo is enabled there is no need to use a
1411 trigger to use buffer mode since the watermark settings
1412 guarantees that the hardware fifo is flushed to the device
1415 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark
1417 Contact: linux-iio@vger.kernel.org
1419 Read-only entry that contains a single integer specifying the
1420 current watermark level for the hardware fifo. If the device
1421 does not have a hardware fifo this entry is not present.
1422 The watermark level for the hardware fifo is set by the driver
1423 based on the value set by the user in buffer/watermark but
1424 taking into account hardware limitations (e.g. most hardware
1425 buffers are limited to 32-64 samples, some hardware buffers
1426 watermarks are fixed or have minimum levels). A value of 0
1427 means that the hardware watermark is unset.
1429 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_min
1431 Contact: linux-iio@vger.kernel.org
1433 A single positive integer specifying the minimum watermark level
1434 for the hardware fifo of this device. If the device does not
1435 have a hardware fifo this entry is not present.
1436 If the user sets buffer/watermark to a value less than this one,
1437 then the hardware watermark will remain unset.
1439 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_max
1441 Contact: linux-iio@vger.kernel.org
1443 A single positive integer specifying the maximum watermark level
1444 for the hardware fifo of this device. If the device does not
1445 have a hardware fifo this entry is not present.
1446 If the user sets buffer/watermark to a value greater than this
1447 one, then the hardware watermark will be capped at this value.
1449 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_available
1451 Contact: linux-iio@vger.kernel.org
1453 A list of positive integers specifying the available watermark
1454 levels for the hardware fifo. This entry is optional and if it
1455 is not present it means that all the values between
1456 hwfifo_watermark_min and hwfifo_watermark_max are supported.
1457 If the user sets buffer/watermark to a value greater than
1458 hwfifo_watermak_min but not equal to any of the values in this
1459 list, the driver will chose an appropriate value for the
1460 hardware fifo watermark level.
1462 What: /sys/bus/iio/devices/iio:deviceX/in_temp_calibemissivity
1463 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_calibemissivity
1464 What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_calibemissivity
1465 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_object_calibemissivity
1467 Contact: linux-iio@vger.kernel.org
1469 The emissivity ratio of the surface in the field of view of the
1470 contactless temperature sensor. Emissivity varies from 0 to 1,
1471 with 1 being the emissivity of a black body.
1473 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_oversampling_ratio
1474 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_oversampling_ratio
1475 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_oversampling_ratio
1477 Contact: linux-iio@vger.kernel.org
1479 Hardware applied number of measurements for acquiring one
1480 data point. The HW will do <type>[_name]_oversampling_ratio
1481 measurements and return the average value as output data. Each
1482 value resulted from <type>[_name]_oversampling_ratio measurements
1483 is considered as one sample for <type>[_name]_sampling_frequency.
1485 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_raw
1486 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_raw
1487 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_co2_raw
1488 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_co2_raw
1489 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_voc_raw
1490 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_voc_raw
1492 Contact: linux-iio@vger.kernel.org
1494 Raw (unscaled no offset etc.) percentage reading of a substance.
1496 What: /sys/bus/iio/devices/iio:deviceX/in_resistance_raw
1497 What: /sys/bus/iio/devices/iio:deviceX/in_resistanceX_raw
1498 What: /sys/bus/iio/devices/iio:deviceX/out_resistance_raw
1499 What: /sys/bus/iio/devices/iio:deviceX/out_resistanceX_raw
1501 Contact: linux-iio@vger.kernel.org
1503 Raw (unscaled no offset etc.) resistance reading that can be processed
1506 What: /sys/bus/iio/devices/iio:deviceX/heater_enable
1507 KernelVersion: 4.1.0
1508 Contact: linux-iio@vger.kernel.org
1510 '1' (enable) or '0' (disable) specifying the enable
1511 of heater function. Same reading values apply
1512 This ABI is especially applicable for humidity sensors
1513 to heatup the device and get rid of any condensation
1514 in some humidity environment
1516 What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw
1518 Contact: linux-iio@vger.kernel.org
1520 Raw (unscaled no offset etc.) pH reading of a substance as a negative
1521 base-10 logarithm of hydrodium ions in a litre of water.
1523 What: /sys/bus/iio/devices/iio:deviceX/mount_matrix
1524 What: /sys/bus/iio/devices/iio:deviceX/in_mount_matrix
1525 What: /sys/bus/iio/devices/iio:deviceX/out_mount_matrix
1526 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_mount_matrix
1527 What: /sys/bus/iio/devices/iio:deviceX/in_accel_mount_matrix
1529 Contact: linux-iio@vger.kernel.org
1531 Mounting matrix for IIO sensors. This is a rotation matrix which
1532 informs userspace about sensor chip's placement relative to the
1533 main hardware it is mounted on.
1534 Main hardware placement is defined according to the local
1535 reference frame related to the physical quantity the sensor
1537 Given that the rotation matrix is defined in a board specific
1538 way (platform data and / or device-tree), the main hardware
1539 reference frame definition is left to the implementor's choice
1540 (see below for a magnetometer example).
1541 Applications should apply this rotation matrix to samples so
1542 that when main hardware reference frame is aligned onto local
1543 reference frame, then sensor chip reference frame is also
1544 perfectly aligned with it.
1545 Matrix is a 3x3 unitary matrix and typically looks like
1546 [0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix
1547 [1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware
1548 are perfectly aligned with each other.
1550 For example, a mounting matrix for a magnetometer sensor informs
1551 userspace about sensor chip's ORIENTATION relative to the main
1553 More specifically, main hardware orientation is defined with
1554 respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where :
1555 * Y is in the ground plane and positive towards magnetic North ;
1556 * X is in the ground plane, perpendicular to the North axis and
1557 positive towards the East ;
1558 * Z is perpendicular to the ground plane and positive upwards.
1560 An implementor might consider that for a hand-held device, a
1561 'natural' orientation would be 'front facing camera at the top'.
1562 The main hardware reference frame could then be described as :
1563 * Y is in the plane of the screen and is positive towards the
1565 * X is in the plane of the screen, perpendicular to Y axis, and
1566 positive towards the right hand side of the screen ;
1567 * Z is perpendicular to the screen plane and positive out of the
1569 Another example for a quadrotor UAV might be :
1570 * Y is in the plane of the propellers and positive towards the
1572 * X is in the plane of the propellers, perpendicular to Y axis,
1573 and positive towards the starboard side of the UAV ;
1574 * Z is perpendicular to propellers plane and positive upwards.
1576 What: /sys/bus/iio/devices/iio:deviceX/in_electricalconductivity_raw
1578 Contact: linux-iio@vger.kernel.org
1580 Raw (unscaled no offset etc.) electric conductivity reading that
1581 can be processed to siemens per meter.
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